Spring-trip for cultivators.



Patented lan. 9, |900.

J. B. BABTHLOMEW. SPRING TRIP FR CULTIVATORS. (Application led June 6,v 1896.)

(No Model.)

Hwy! lll* A l mum mw j mu-lmunmumuu' i lllll WLM/www UNITE STATES PATENT OFFICE.

JOHN B. BARTHOLOMEW, OF PEORIA, ILLINOIS.

SPRING-TRIP FOR CULTIVATORS.

SPECIFICATION forming part of Letters Patent No. 640,858, dated January 9, 1900. Application led .Tune 6, 1896. Serial No. 594,583. (No model.)

To all whom, it may concern.-

, Be it known that LJOHN B. BARTHOLOMEW, a citizen of the United States, residing at Peoria, in the county of Peoria and State of Illinois, have invented certain new and useful Improvements in Spring-Trips for Cultivators; and I do declare the following to be a full, clear, and exact1 description of the invention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

Figure l is a side view of a sufficient portion of parts of a cultivator to illustrate the manner of applying my invention, said parts being shown in said figure in the position normally occupied when the` shovel or hoe is in operation. Fig. 2 is a side view of the same parts, showing them in the positions occupied when the shovel or hoe is pushed backward by an obstruction relatively to the beam or standard. Fig. 3 is a horizontal section on the line :t x of Fig. 1. Fig. t is a section on the line y y of Fig. 2. Fig. 5 is a partial side View, and Fig. 6 a rear view, of a slightlymodified structure. Fig. 6 is a rear view of the device in Fig. 5. Fig. 7 is a side view having one of the parts of the toggle-joint removed.

In the drawings,A indicates a part of a beam or drag-bar, it having at the rear end a standard portion or shank A', these being shown as integral, the part A' being curved downward from the part A.

B indicates a shovel, tooth, or hoe. This may be of any preferred form. As shown, it is provided with a socket on the rear side by which it can be adjustably secured to the support C. The support C is pivotally connected at c to the shank or standard either directly, as shown in Fig. 5, or through the medium of an interposed carrier D. It has a rearward extension c2 or spur. It is of the nature of a sleeve in so far as it is shaped to loosely embrace more or less of the shank. A toggle-joint composed of the members F G connects the extension or spur cia with the shank or standard or with a part extending rearwardly therefrom. In the construction shown the parts G and F are hinged togetherat g. The partGis hinged to an arm H, which extends backward and upward from the standard, it being pivoted at h to the aforesaid carrier I). The latter is adj ustably secured to the standard by a bolt E, which passes through short slots d in each side piece of the carrier D and through an aperture in the standard A. The lower part F of the toggle is pivoted to the extension or spur c2 of the shovel-support O. The toggle member F has a rearward and upward extending part f, terminatin g in or provided with a hook termination f. The arm H extends upward from the pivot g of the toggle member G and is then preferably curved backward, as at h. As aforesaid, it is supported on a pivot at h', and it has below said pivot a short lever-arm H. When the parts are in normal position, as in Fig. l, the part F of the toggle bears against this short lever-arm H', it preferably having a suitable shoulder at f4, as shown in Fig. 7. A spring I is interposed between the hook partfof the lower toggle andthe curved part h of the arm H. The tension of the spring can be adjusted by means of an eye-rod J, which passes up through an aperture in the arm h and is provided with a thumb-nutty'.

When the parts are in the positions shown in Fig. 1, the toggle members are so related that the pivot at g is in the line joining the pivots c' g' or very slightly inside of said line. The pivot at h', which supports the bar H, is preferably inside of said line, and at this time the spring I acts to draw toward each other the outer end of the toggle F and the upper end of the arm H, this resulting in holding the pivot g inward or in the aforesaid line and in holding the short arm H also inward. Under these circumstances there will be more or less of a positive force exerted by the toggle to hold the shovel B in'working position-that is to say, it will be held by a somewhat positive lock but it will be seen that when a force of'certain magnitude is exerted backward against the shovel and the latter is caused to tend to rock around'the pivot at c and exert an upward thrust through the arm or extension c2 upon the toggle members F G the latter will in turn exert a thrust upon the arm H, and as it can swing slightly around its pivot h' it will do so, assuming that the pressure is sufficient to overcome the IOO resistance of the spring I. The instant the arm II begins to swing inward at its upper end the lower end II' rocks backward slightly, but sufficiently to press against the toggle member F at a point near the hinge g and push said hinge or pivot a little back of the linebetween the pivots g and c. Instantly thereupon the toggle-lock is opened, and under the pressure exerted from the shovel and the arm o2 the member F is pushed freely backward, allowing the shovel to assume the position shown in Fig. 2 and ride over or escape from the obstruction against which it has impinged. Immediately after the togglelock is opened and the pivot g begins to move backward Ithe spring draws the arm H again to such position as to hold the part H forward iirmly. From the instantimmediately following the opening of the lock the arm or bar II serves as an abutment for the draft of the spring, and as the shovel swings backward and the central toggle-pivot g moves also backward and the bottom toggle-pivot c' moves upward the projection or extension f on the bottom toggle member is carried downward in such way as to stretch the spring I,

, and therefore after the obstruction has been passed the spring is so disposed that it can draw up on the part F and rock the shovel back to working position and bring the toggle-pivots again to the locking-line.

In Figs. 5 and 6 a slight modification is shown. In this case the shovel support or part C being of the nature of a sleeve pivoted at c to the lower end of the shank part A. The attachment D is not connected directly to the sleeve or support C, but has its ears or side plates bolted at E to the shank. In other respects the construction in these tigures is the same as that in Figs. l and 2 and may be used in place thereof, if desired.

In the mechanism in Figs. l and2 the shank or standard A is or may he extended down far enough to carry the pivot c, and the part C can be loosely sleeved upon the shank. By means of a supplemental carrier, such as shown at D, the several parts can be adjusted from one position to another.

I am aware that yielding cultivator-teeth of various sorts have been heretofore used or proposed and also that toggle-joints of various constructions and under various arrangements have been combined with pivoted shovels; but I believe myself to be the iirst to have provided a construction having a number of novel features, such as are herein presented. It will be seen that the toggle-joint is vertically arranged and approxi mately parallel to the neighboring portion ofthe shank or standard, and that these parts are arranged compactly and so as to provide no rearwardlyextending obstructions of any material dimensions. The parts combined with the shoe and shank are, moreover, placed behind the shank and are therefore not situated so as to accumulate or engage with stalks or other waste.

One advantageous feature of the construction is the employment of a bar supplemental to the parts of the toggle-joint and united by a separate hinge to the shank or beam, which bar projects upward and is elongated sutilciently to allow the employment of a suliciently long spring which extends down from its upper end to the lower toggle member.

One of the differences between the present construction and most of the earlier ones lies in this, that I can provide a practically positive lock and have means supplemental to the shovel for opening this lock, such means being here the arm or bar H, adapted to swing slightly on its pivot lt and press the toggle members out of the locking-line. This is in coutradistinction to those constructions employing a toggle-joint and a spring so arranged as to normally hold the members of the toggle nearly, but not quite, in the locking-line. When the parts of the toggle are allowed to come to the line of positive lock, as in the construction illustrated, means are necessary for releasing the lock ot the toggle, which occu rs, and I believe myself to have been the first to have devised means of the sort herein shown and described for this purpose, although I am aware that prior to my present invention Robert H. Avery invented a diderent construction and arrangement of parts having a horizontally-arranged toggle and a support projected directly backward from the shank; but notwithstanding the above fact-namely, that in this particular construction the parts are so arranged that the toggle elements can be brought to line-I wish it to be understood that I do not limit myself to those features of the construction, arrangement', and operation, as there are a number of features of my invention which can be employed with cultivater-shoe supports of the other sorts, particularly with those having a toggle joint pivotally connected on the one hand to the hinged sleeve or support for the shovel and connected on the other hand to the shank or beam in connection with a spring which holds the center toggle-pivot slightly out of the line of the end pivots. Thus a spring-carrying bar extended upward and more or less independent of or supplemental to thetoggle members can be employed and utilized to perform the functions ot' bar H herein. Nor do I limit myself to having the toggle members connected directly by a pivot to the bar I-I, as other arrangements can be employed both to allow the arm H to cooperate with the spring and toggle to hold the shoe in working position and also to start the movement et' the IIO toggle if a lock be utilized. such as herein devices being shown, for instance, in the Patents No. 158,081 to Hewett, No. 247 ,7 56 to Grissinger, No. 256,356 to Hertel', and No. 810,821 to Hench and Dromgold; but l believe myself to be the first to have devised a construction of the character of that herein having one of the toggle-arms connected to a vibratable carrier pivoted to the shank instead of having the said part of the toggle held by a rigid pivot, this being one of the specific features of the present devices, although my invention is not in all respects limited thereto.

What I claim is- 1. A spring-trip for cultivators, comprising a shank, a shovel support or sleeve pivotally connected with the shank, a toggle-joint connected withv the support and with the shank, an arm pivoted on the shank and adapted to bear against the toggle-joint, and a spring connecting the arm with a member of the toggie-joint, substantially as set forth.

2. Aspring-trip for cultivators, comprising a shank, a shovel support or sleeve pivotally connected with the shank, a toggle-joint connected with the support and with an extension rigid with the shank, a spur on the toggle-joint, an arm pivoted on the shank adjacent to the upper pivot of the toggle-joint and having a bearin g in its under surface adapted to engage the spur of the toggle-joint, and a spring connecting the arm with the lower member of the toggle-joint, substantially as set forth.

3. Aspring-trip for cultivators, comprising a shank, a shovel-support pivotally connected with the shank, a substantially vertically arranged togglelever bearing against the shovel-support when in the closed position, an arm supplemental to the toggle-levers and pivoted to the shank, said arm extending upward from the toggle, and a spring connected to the said arm and to the lower lever of the toggle, substantially as described.

4. A spring-trip for culti vators, comprising a shank, a shovel sleeve or support pivotally connected with the shank, a vertically-arranged toggle-joint connected with the sleeve, an arm pivoted to the shank, said arm and the upper toggle-bar having separable surfaces bearing against each other during a part only of their movement, and a spring connecting the said bar to the lower toggle-lever, substantially as set forth.

5. A spring-trip for cultivators, comprising a shank, a shovel-sleeve pivotally connected with the shank, a toggle-joint connected with the support, the lower toggle member having an outwardly-projecting arm, a bar supplemental to the toggle-joint and movable relatively thereto and pivotally connected to the shank, and having an upwardly-projecting end, and a spring connecting the said upwardly-projecting end with the extension on the lower toggle member, substantially as de scribed.

6. A spring-trip for cultivators, comprising a shank, a shovel sleeve or support, pivotally connected with the shank, a toggle-joint connected with the sleeve, or support, a spring extending upward from and engaging with the lower toggle member, a bar or arm supplemental to the toggle-joint and united by its separate pivot to the shank or beam, the toggle members being adapted to move both with said bar or arm and also to move independently thereof, andv said arm being connected to the upper end of said spring, and adapted to transmit spring-pressure to the toggle-joint for holding it in the closed position, substantially as set forth.

7. Aspring-trip for cultivators, comprising a shank, a shovel sleeve or support, pivotally connected With the shank, a toggle-joint connected with the sleeve or support, a spring extending upward from and engaging with the lower toggle member, and a bar or arm supplemental to the toggle-joint and united by its separate pivot to the shank or beam, said arm having an upward and backward eX- tension to which is connected the upper end of said spring, the toggle-joint and the spring being approximately parallel when the joint is closed, and said bar and spring acting to hold the joint closed ,substantially as set forth.

8. A spring-trip for cultivators, comprising a shank, a shovel sleeve or support, pivotally connected with the shank, a toggle-joint connected with the sleeve or support, and aspring arranged to press the toggle-joint toward the closed position and having its upper end secured to a support supplemental to the togglejoint and movable independently thereof,substantially as set forth.

9. A spring-trip for cultivators, comprising a shank, a shovel sleeve or support pivotally connected with the shank, a toggle-joint c011- nected with the sleeve or support, the lower member of said joint having an outer eXtension, a spring secured to said extension, and a movable bar or arm adapted to bear against the toggle-joint and having its upper movable end secured to said spring, substantially as set forth.

10. In a trip for cultivator-shovels, the combination of the shank, the shovel, pivotally connected to the shank, the toggle-joint-pivoting devices connecting the toggle and the shovel, the spring connected to the toggle, and a bar, H, movable with the toggle during part of the movement of the latter and stationary during the remainder of the said movement, substantially as set forth.

11. In a trip for cultivator-shovels, the combination of the shank, the shovel movable relatively to the shank, the toggle having the members F, G, the member F having the extension f, the bar, H, having the turned part, h, and the spring connecting the parts, hand F, substantially as set forth.

12. In atrip for cult-ivator-shovels, the combination of the shank, the shovel movable relatively to the shank, the two-part lock having the members F, G, arranged vertically, and means supplemental to the shovel, the

IOO

IIO

shank 'and the look foropening the said look; l able Carrier, D, having slots, d, and the bolt,

substantially as set forth.

13. The combination of the shank, the shovel, the toggle, the spring, and the Vibrat- 5 able carrier for the toggle adjustable relatively to the shank,sad carrier bein g automateally movable when the toggle-arms move, substantially as set forth.A 14.. The combination of the shank, the ro shovel, the toggle, the spring, and the vibrat- E, said carrier being automatically movable when the toggle-arms move, subsant-ially as seb forth.

In testimony whereof I ax my signature 15 in presence of two witnesses.

JOHN B. BARTHOLOMEW.

Witnesses:

S. D. WHITE, H. D. KELLENBACH. 

